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Oracle Database Administration II Sample Questions (Q207-Q212):

NEW QUESTION # 207
Which two statements are true about indexes and their administration in an Oracle database?

A. A non-unique index can be converted to a unique index using a Data Definition Language (DDL) command.
B. An index can be scanned to satisfy a query without the indexed table being accessed.
C. An invisible index is maintained when a Data Manipulation Language (DML) command is per- formed on its underlying table.
D. A descending index is a type of bitmapped index.
E. An index is always created by scanning the key columns from the underlying table.

Answer: B,C

NEW QUESTION # 208
Which two are true about gathering optimizer statistics? (Choose two.)

A. System statistics can be gathered only while connected to CDB$ROOT.
B. Executing DBMS_STATS.GATHER_DATABASE_STATS while connected to CDB$ROOT gathers object statistics in all open PDBs except PDB$SEED.
C. Executing DBMS_STATS.GATHER_DATABASE_STATS while connected to CDB$ROOT gathers object statistics in all open pluggable databases (PDBs)
D. Executing DBMS_STATS.GATHER_DATABASE_STATS while connected to CDB$ROOT gathers object statistics only in CDB$ROOT.
E. Executing DBMS_STATS.GATHER_DATABASE_STATS while connected to a PDB opened in read/write mode gathers object statistics for that PDB.

Answer: C,E

Explanation:
Explanation
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.

NEW QUESTION # 209
Choose three. Which three are true about the Oracle Optimizer?

A. It obeys all hints.
B. It updates stale object statistics in the Data Dictionary.
C. It considers object statistics when generating execution plans for SQL statements.
D. It considers the filters in WHERE clauses when generating execution plans for SQL statements.
E. It can only use SQL Plan Directives tied to the SQL statement for which a plan is being generated.
F. It can re-optimize execution plans after previous executions detect suboptimal plans.

Answer: B,D,F

NEW QUESTION # 210
Choose three. Which three are true about RMAN archival backups with the RESTORE POINT clause?

A. They are never considered obsolete by RMAN.
B. The SPFILE is included in the archival backup.
C. Archive logs are retained if they are necessary to allow the database to be recovered to a consistent state when an archival backup is restored.
D. Use of a recovery catalog is always required to support the creation and use of archival backups. G)The ARCHIVAL attribute for a backup overrides the RMAN retention policy.
E. All archive logs are retained after an archival backup is taken, until the next archival backup is taken of the same database.
F. They can optionally be written to a fast recovery area (FRA).

Answer: B,C,D

NEW QUESTION # 211
Choose the best answer. Examine this configuration: 1. CDB1 is a container database. 2. APP_ROOT is an application root in CDB1. 3. APP_PDB1 is an application PDB in APP_ROOT. 4. FLASHBACK DATABASE is ON. You execute these commands: $ sqlplus sys/orac1e_4U@localhost:1521/cdb1 SQL> SELECT current_scn FROM v$database; CURRENT_SCN -----------------------2074756 SQL> CREATE TABLE cdb1_tab(c1 NUMBER) ; Table created. SQL> ALTER SESSION SET CONTAINER=app_root; Session altered. SQL> CREATE TABLE app_root_tab (c1 NUMBER) ; Table created. SQL> ALTER SESSION SET CONTAINER=app_pdb1; Session altered. SQL> CREATE TABLE app_pdb1_tab (c1 NUMBER) ; Table created. SQL> conn / as sysdba Connected. SQL> ALTER PLUGGABLE DATABASE app_root CLOSE; Pluggable database altered. SQL> FLASHBACK PLUGGABLE DATABASE app_root TO SCN 2074756; Flashback complete. Which table or set of tables will exist after the Flashback operation has completed?

A. CDB1_TAB and APP_ROOT_TAB
B. CDB1_TAB only
C. CDB1_TAB, APP_ROOT_TAB, and APP_PDB1_TAB
D. CDB1_TAB and APP_PDB1_TAB
E. none of the tables, because all three tables will be dropped

Answer: D

NEW QUESTION # 212
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